Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quão baixa era a renda de San Juan?
 ###Tabelas: CREATE TABLE series_6 (series_6_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Episode INT, Performer 1 VARCHAR, Performer 2 VARCHAR, Performer 3 VARCHAR, Performer 4 VARCHAR) CREATE TABLE cities_between_100000_and_1000000_population (cities_between_100000_and_1000000_population_id AUTO_INCREMENT PRIMARY KEY, Rank INT, City VARCHAR, Province VARCHAR, Date of Official Foundation of Municipality INT, 2006 INT) CREATE TABLE team_career_passing_records (team_career_passing_records_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Completions INT, Attempts INT, Completion % VARCHAR, Yards INT, Touchdowns INT, Interceptions INT, QB Rating VARCHAR) CREATE TABLE  (_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, 2010 Population (000) INT, 2008 GDP (USD bn) a VARCHAR, 2008 GDP per capita (USD) a INT, Agri culture b VARCHAR, Mining b VARCHAR, Manufac turing b VARCHAR, Services & cons truction b VARCHAR, Exports (USD mn) 2011 INT, Median mo. salary (USD) a e INT, Vehicles (per 1000) d INT, Income poverty f VARCHAR, Structural poverty g VARCHAR) CREATE TABLE methodology (methodology_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Country VARCHAR, Disposable USD 2011 INT, Disposable USD growth INT, Compulsory deduction VARCHAR, Gross USD 2011 INT)  
SELECT Income poverty f FROM  WHERE District = San Juan